公开(公告)号：US10996369B2

公开(公告)日：2021-05-04

申请号：US16234632

申请日：2018-12-28

Applicant: NUCTECH COMPANY LIMITED ,  TSINGHUA UNIVERSITY

Inventor： Hao Yu ,  Ying Li ,  Weizhen Wang ,  Quanwei Song ,  Dongyu Wang ,  Haojie Chi ,  Jianmin Li ,  Yulan Li ,  Chunguang Zong ,  Zhiqiang Chen ,  Yuanjing Li ,  Li Zhang

IPC: G01N23/203 ,  G01V5/00

Abstract: The present disclosure discloses a vehicle-mounted type back scattering inspection system. The vehicle-mounted type back scattering inspection system includes a carriage and a back scattering imaging device, the scanning range of the back scattering imaging device is variable. As the scanning range of the back scattering imaging device of the present disclosure is variably set, the inspection range of the back scattering imaging device can be expanded.

公开(公告)号：US10914693B2

公开(公告)日：2021-02-09

申请号：US16045243

申请日：2018-07-25

Applicant: Tsinghua University ,  NUCTECH COMPANY LIMITED

Inventor： Liang Li ,  Zhiqiang Chen ,  Li Zhang ,  Ziran Zhao ,  Yuxiang Xing ,  Siyuan Zhang

IPC: G01N23/00 ,  G01N23/2206 ,  G01N23/046 ,  G01N23/223 ,  A61B6/03 ,  A61B6/06 ,  A61B6/10 ,  A61B6/00

Abstract: The present disclosure discloses a ray transmission and fluorescence CT imaging system and method. The system comprises: a ray source configured to emit a beam of rays; a rotational scanning device configured to perform rotational CT scanning on an object to be inspected; a transmission CT detector configured to receive the beam of rays which has passed through the object; a fluorescence CT detector configured to receive fluorescent photons excited by irradiation of the beam of rays on the object; a data acquisition unit configured to acquire a transmission data signal and a fluorescence data signal respectively; and a control and data processing unit configured to control the ray source to emit the beam of rays, control the rotational scanning device to perform the rotational CT scanning, and obtain a transmission CT image and a fluorescence CT image simultaneously based on the transmission data signal and the fluorescence data signal.

公开(公告)号：US10810437B2

公开(公告)日：2020-10-20

申请号：US15822920

申请日：2017-11-27

Applicant: Nuctech Company Limited

Inventor： Zhiqiang Chen ,  Li Zhang ,  Gang Peng ,  Zhisheng Dai ,  Yunda Sun ,  Dong Li

IPC: G06K9/00 ,  G06K9/46 ,  G06K9/78 ,  G06T7/00 ,  G08B7/06

Abstract: The present disclosure relates to a security check system and method. The present disclosure provides a security check system for identifying objects of interest from multiple objects, comprising: an object-of-interest determining device for determining whether an object is an object of interest; an image mark applying device for acquiring images related to selected objects among the multiple objects and recording image marks of the selected objects; and a mark detecting device for detecting the image marks, wherein the security check system is configured to identify whether the object is the object of interest based on the detection of the mark detecting device and outputs a warning accordingly.

公开(公告)号：US10782246B2

公开(公告)日：2020-09-22

申请号：US15827739

申请日：2017-11-30

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： Chunguang Zong ,  Ying Li ,  Hejun Zhou ,  Quanwei Song ,  Jianmin Li ,  Yulan Li ,  Yuanjing Li ,  Li Zhang ,  Zhiqiang Chen

IPC: G01N23/04 ,  G01N21/90 ,  G01V5/00 ,  G01N21/01

Abstract: A movable ray inspection system used to be mounted in a container yard to inspect an object within a container is provided. The movable ray inspection system includes: a ray generator device configured to emit a ray, a ray receiving device configured to receive the ray, and at least one chamber for receiving the ray generator device and the ray receiving device therein. Each of the at least one chamber is configured to be a standard container or a chamber which has a same shape, a same size and a same structure as a standard container such that the movable ray inspection system is adapted to be stacked in the container yard.

公开(公告)号：US10649104B2

公开(公告)日：2020-05-12

申请号：US15597003

申请日：2017-05-16

Applicant: Tsinghua University ,  NUCTECH COMPANY LIMITED

Inventor： Liang Li ,  Zhiqiang Chen ,  Li Zhang ,  Ziran Zhao ,  Yuxiang Xing ,  Kejun Kang ,  Lan Zhang ,  Ruizhe Li

IPC: G01T1/36 ,  G01N23/223 ,  G01T7/00

Abstract: A method and apparatus for reconstructing an incident energy spectrum for a detector are disclosed. In this method, an object to be inspected is illuminated with rays, and then rays transmitted through the object to be inspected are received by the detector to convert the received rays into data of a detected energy spectrum. The incident energy spectrum for the detector is reconstructed based on the data of the energy spectrum using a statistical iterative algorithm with a pre-established detector response function. With the above solution of the embodiments, the incident energy spectrum for the detector can be more accurately acquired, thereby reducing a distortion of the incident energy spectrum caused by the detector.

公开(公告)号：US20200025968A1

公开(公告)日：2020-01-23

申请号：US16232058

申请日：2018-12-26

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

Inventor： Yigang YANG ,  Dongyu Wang ,  Hao Yu ,  Quanwei Song ,  Jianmin Li ,  Weizhen Wang ,  Yulan Li ,  Chunguang Zong ,  Qinjian Zhang ,  Ming Zeng ,  Zhiqiang Chen ,  Yuanjing Li ,  Li Zhang

IPC: G01V5/00 ,  G01N23/20

Abstract: The present disclosure discloses a radiation inspection system and a radiation inspection method. The radiation inspection system comprises a radiation source and a beam modulating device. The beam modulating device comprises a first collimating structure disposed at a beam exit side of the radiation source and a second collimating structure disposed at a beam exit side of the first collimating structure. The second collimating structure is movable relative to the first collimating structure to change a relative position of the first collimating port of the first collimating structure with the second collimating port of the second collimating structure, and the beam modulating device is shifted between a first operational state in which the beam modulating device modulates an initial beam into a fan beam, and a second operational state in which the beam modulating device modulates the initial beam into a pencil beam variable in position.

公开(公告)号：US10408966B2

公开(公告)日：2019-09-10

申请号：US15122659

申请日：2015-03-03

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Zhiqiang Chen ,  Li Zhang ,  Tianyi Yangdai ,  Qingping Huang

IPC: G01T1/00 ,  G01V5/00 ,  G01N23/10 ,  G01N23/083 ,  G01T1/36

Abstract: The present disclosure discloses an inspection device, an inspection method and an inspection system. The device comprises a distributed ray source comprising multiple source points; a light source collimator configured to converge the rays generated by the distributed ray source to form an inverted fan-shaped ray beam; a scatter collimator configured to only allow rays scattered at one or more particular scattering angles which are generated by the rays from the light source collimator interacting with inspected objects to pass; at least one detector each comprising multiple detection units which have an energy resolution capability and are substantially arranged in a cylindrical surface to receive the scattered rays passing through the scatter collimator; and a processing apparatus configured to calculate energy spectrum information of the scattered rays from the inspected objects based on a signal output by the detectors.

公开(公告)号：US10379252B2

公开(公告)日：2019-08-13

申请号：US15217787

申请日：2016-07-22

Applicant: Tsinghua University ,  NUCTECH COMPANY LIMITED

Inventor： Zhiqiang Chen ,  Yuanjing Li ,  Li Zhang ,  Ziran Zhao ,  Yaohong Liu ,  Juan Zheng ,  Jianping Gu ,  Chunguang Zong

IPC: G01V5/00 ,  G01N23/04 ,  G01N23/046 ,  G01N23/06 ,  G01N23/083 ,  G01N23/087 ,  G01N23/10 ,  G01V5/12

Abstract: Disclosed is a method and device for estimating weight of an object to be inspected in an inspection system. An effective atomic number and a high-energy gray value of the dual-energy corresponding to each pixel of the object to be inspected are obtained by a dual-energy radiation scanning. A mass-thickness value for a corresponding pixel is obtained from a pre-created mass-thickness attenuation curve by utilizing the effective atomic numbers and the high-energy gray value of the dual-energy for respective pixels. Weight information for at least a part of the object to be inspected is calculated by multiplying the mass-thickness value by the area of the pixel. Such a method may accurately calculate the weight of the object to be inspected and save the cost for a conventional weighing hardware.

公开(公告)号：US10379067B2

公开(公告)日：2019-08-13

申请号：US15257595

申请日：2016-09-06

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Zhiqiang Chen ,  Li Zhang ,  Tianyi Yang Dai ,  Ji Zhao ,  Xin Jin ,  Ming Chang

IPC: G01N23/00 ,  G01N23/046 ,  G01N23/20 ,  G21K1/02 ,  G01V5/00

Abstract: Systems and methods for liquid detection are disclosed. An illustrative method for liquid detection herein may include implementing CT imaging and XRD imaging on one or more liquid planes of liquid contained in a container at once by rotating the container so that X-rays from a same radiation source scan a whole area of each of the one or more liquid planes, and generating a substance identification result for the liquid contained in the container based on a CT image and a XRD image, wherein the CT imaging and the XRD imaging are implemented on a same liquid plane or different liquid planes. Consistent with various aspects and features, implementations may identify substances contained in the liquid more quickly and accurately.

公开(公告)号：US10371854B2

公开(公告)日：2019-08-06

申请号：US15230316

申请日：2016-08-05

Applicant: NUCTECH COMPANY LIMITED ,  NUCTECH JIANGSU COMPANY LIMITED

Inventor： Ziran Zhao ,  Zhiqiang Chen ,  Wanlong Wu ,  Li Zhang ,  Yingkang Jin ,  Ming Ruan

IPC: G01V5/00

Abstract: A safety inspection apparatus is disclosed in embodiments of the present invention. The safety inspection apparatus includes: an x-ray source including a ray emission focal spot; and a plurality of detector modules each of which has a ray receiving surface, and which are arranged along a plurality of straight line segments. The plurality of straight line segments include a first straight line segment and two second straight line segments, and, the two second straight line segments extend from the two ends of the first straight line segment towards the x-ray source side, respectively. In a plane where the sectorial ray beam is located, a normal to the ray receiving surface of each of the detector modules at a midpoint of the ray receiving surface of the each of the detector modules passes generally through the ray emission focal spot of the x-ray source.